Why aren't you doing your homework ?   I'll do it later , Dad . I must prepare the concert on Saturday .   Oh , is it ? You'll be making records next , will you ?   We hope so .   You'd better get on with your homework ! You can practice on Sunday .   Oh dad . You don't understand at all .   I certainly could . You'll get exams next month .   I don't need it to play the guitar .   Oh , don't you ? God save me !   I'm sorry . 